ABB 1MRK000173-BC Binary I/O Module | Relion 670 Series

Product Description

Overview

The ABB 1MRK000173-BC is a high-reliability Binary Input/Output (BOM) module designed for ABB Relion 670 series relays, including RED670, REL670, and REC670, as well as selected 650 series IEDs. This module acts as an interface between the IED and primary substation equipment, enabling precise monitoring and control of devices such as circuit breakers, disconnectors, and transformers. Built for high-speed performance and electromagnetic resilience, it ensures safe, accurate operations in critical protection schemes.

Key Features

High-Speed Signal Handling
Binary inputs incorporate programmable debounce filters, and output relays operate with low latency, crucial for protection applications requiring millisecond response times, such as tripping commands.

Robust Input Monitoring

• Individually isolated inputs to prevent propagation of surges or noise

• Adjustable voltage thresholds compatible with various DC systems (110–125 VDC standard)

• Integration with disturbance recorder for timestamped input events

Heavy-Duty Output Relays

• Designed to switch inductive loads like breaker trip coils

• Capable of high make currents (up to 30A) and safe breaking at rated DC voltage

• Continuous current handling without overheating

Self-Diagnostics and Safe Operation

• Cyclic internal tests to validate output circuitry

• Outputs default to a safe state under failure conditions

• Filtering ensures immunity to stray voltages in long cabling

Durability in Harsh Environments

• Compliance with IEC EMC standards for substation immunity

• Resistant to vibration, mechanical shock, and temperature extremes (-25°C to +70°C)

Technical Specifications

Applications

Ideal for Circuit Breaker Control, Trip Logic, and Status Feedback monitoring of substation devices. It provides a reliable interface for both control commands and status acquisition, ensuring uninterrupted protection relay operations.

FAQ

Q: Can this module be retrofitted into existing Relion 670 relays?
A: Yes, ensure the revision code (R00) matches the existing hardware for correct terminal alignment and logic.

Q: How does the module handle induced voltages in long cables?
A: Advanced filtering and galvanic isolation prevent false triggering caused by stray or induced voltages.

Q: What is the maximum continuous load the output relays can handle?
A: Relays are rated for high continuous currents without overheating and support standard breaker coil loads.

Comparison with Other I/O Modules
Compared to ABB 1MRK000173-BE, the BC variant offers slightly higher isolation and improved EMC resilience, making it suitable for high-noise environments.